JPS5612656A - Electrophotographic method and its apparatus - Google Patents

Electrophotographic method and its apparatus

Info

Publication number
JPS5612656A
JPS5612656A JP8848479A JP8848479A JPS5612656A JP S5612656 A JPS5612656 A JP S5612656A JP 8848479 A JP8848479 A JP 8848479A JP 8848479 A JP8848479 A JP 8848479A JP S5612656 A JPS5612656 A JP S5612656A
Authority
JP
Japan
Prior art keywords
image
latent image
red
black
primary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP8848479A
Other languages
Japanese (ja)
Other versions
JPS6313536B2 (en
Inventor
Shuichi Karasawa
Shuichi Tsushima
Fuyuhiko Matsumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP8848479A priority Critical patent/JPS5612656A/en
Publication of JPS5612656A publication Critical patent/JPS5612656A/en
Publication of JPS6313536B2 publication Critical patent/JPS6313536B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Electrophotography Using Other Than Carlson'S Method (AREA)

Abstract

PURPOSE: To enable an image to be erased by approaching one of latent image potentials to zero, by controlling potential of primary and secondary charging reverse in polarity to each other in a 2 color image reproduction method.
CONSTITUTION: A photoreceptor is subjected to primary charging by application of positive voltage to primary charger 15 from power source 25, under illumination of red light from lamp 23, and the photoreceptor is subjected to secondary charging by application of negative voltage to secondary charger 16 from power source 26. It is exposed on the surface to light image 40 of a 2-color original using a halogen lamp to form a positive latent image corresponding to the red image and a negative latent image corresponding to the black image. The first developing unit 17 develops the latent image red, and the second developing unit 18 develops the latent image black. For example, when the red image is erased and only the black image is reprodued, chargers 15, 16 are controlled, and negative voltage is applied from source 26 to stop unit 17.
COPYRIGHT: (C)1981,JPO&Japio
JP8848479A 1979-07-12 1979-07-12 Electrophotographic method and its apparatus Granted JPS5612656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8848479A JPS5612656A (en) 1979-07-12 1979-07-12 Electrophotographic method and its apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8848479A JPS5612656A (en) 1979-07-12 1979-07-12 Electrophotographic method and its apparatus

Publications (2)

Publication Number Publication Date
JPS5612656A true JPS5612656A (en) 1981-02-07
JPS6313536B2 JPS6313536B2 (en) 1988-03-25

Family

ID=13944062

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8848479A Granted JPS5612656A (en) 1979-07-12 1979-07-12 Electrophotographic method and its apparatus

Country Status (1)

Country Link
JP (1) JPS5612656A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63186136U (en) * 1987-05-21 1988-11-29

Also Published As

Publication number Publication date
JPS6313536B2 (en) 1988-03-25

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